Doughnut forming machine



July 5, 1932.

F. L. SCHOEL 1,866,061

DOUGHNUT FORMING MACHINE Filed Dec; 18, 1,929 5 Sheets-Sheet 1 52221222202 'ed L. Jehoel July 5, 1.932..

F. L. SCHOEL 1,866,061

DOUGHNUT FORMING MACHINE Filed Dec. 18, 1929 s sheets-sneet 2 July 5, 1932. 1 SCHOEL 1,866,061

DOUGHNUT FORMING MACHINE Filed Dec. 18, 1929 5 Sheets-Sheet s Patented Jul '5, 19 2 FRED L, scHoE or wArERI Jool-rowle,'AssIGnoR o GEM nouermur macnmn com- 1 I rm mc or wnrnntoo, IOWA'\ v w v lnoueinw'r roamme mcnmn Application filed December 1s,'1929.. Seria1 No;414 ,942.

v The object of my inventionis to provide a doughnut forming machine of simple, durable and comparatively mexpensi'veconstruction.

A further objectis to provide a doughnut forming machine consisting of, a hopper supported -bv a cam housing, the housing being supported on an adjustable bracket secured to a wall or other support, whereby the hop per may be moved to any desiredposition for discharging formed doughnuts therefrom.-

Another object is to provide adoughnut forming mechanism consisting'of a neck on the hopper through which apair of plungers are movably mounted for confiningbetween them a charge of .dough and discharging it inthe-form of a-ring from the lower end of the necK. V

A further object isto lprovidea cam and lever mechanism for actuating theplungers.

cams, one for each plunger the cams being variable with respect to each other for varyingthe charge of dough and consequentlythe size ofthe doughnut formed by the machine.

:A further object is to provide means tor rotating the cams, COIISlStlIlgOf a motor dr ven worm and a Worm gearwith anovel clutch arrangement to prevent operation; of the, canis even though the motor continues to run.

vers, plungers, eto., are,supported foritheir respective movements and the GIItIIQdeVlCe Figure 6 is Vnutsand i :y'Figure 1-1 is 'a' detailedsectijonal fviewhn l the line 3 3 of FigureQ, illustrating the cam, 4

leverandplunger mechanism. a 1 p V Figure; i ,isan enlarged sectional view on the line HOf Figure 2, further illustrating thecam mechanism.

the line 5- of Figure2, illustrating the, operative connection between, the motor; and cam shaft. i

clutch and' cam niechanismandi their posit ons with respect to each othe'rv c i j Figure 7 is. an end viewyofffth gage, levers Figure 8 is a sectional viewon the. line *of Figure 3, illustrating the plungerrodsra'nd Vtheir-relativepositions; W I 1: Still another objectis toi'provide a pair of v I the plungers indifferent i Figure 9 is a diagrammaticfview, showing positions for forming asmalldoughnuti, I c t ,Figure lOflis a smallerview, showingthe 7 machine. adjusted A theline 11 -11 ofFigure 1. On the accompanying drawings I'have used porting plate, adapted to be secured to an-wall 12 or othersupported surface. A pairv ofears 1% are formed on the plate 10th'rough which I .ap1n 16 extends. A bracket arm 18 ispivoted for-forming, large jdou'gh- Figure 5 is an enlarged sectionalview 011' c anienlargedisectionail.view onnq the. line ;6*6" of Figure'Q, illustrating the o v jthereference numeral -10..to 'indicate 'aj'sup-f- Still a further object is to prov de novel details of construction whereby thecams, le-

supported, relative to a wallro'r other surface. on the pin 16 and a second bracket arm QOis Still another object is to arrange the'ihoppivoted hyme'ansof a pin22to the'arm 18. per and associated parts to facilitateremo'val A cam housing A, consisting of a housing thereof for'cleaningpurposes, I 1nember24anda housing 1nember'26 ispivot- With these and other'obj ectsin View my in- 1 ally mounted on a pin 28, carried-by the brack 'vention consists in the construction',arrangeet arm 20. A dough hopper Bis carried by 1 ment and combination of the various parts of the cam housingA in the followingidesc'ribed 1 my device. whereby the objects contemplated manner: A=lug 30 extends downwardly from are attained; as hereinafter'more 'fullys't each portion24 and QGofthecam housing A.

forth, pointed out in my"claims, andill'us-a A supporting;ring,..comprisingjportions 32 7 trated in the accompanying 1 drawings, in 1 andfili secured tothe lugs30 by caps'crews-i which:

s 36.1The portions 32and'34 and theringC ---Figure l'is aperspectiveview .of my dough- ,alehinged together atf38.gForked=fears .40 .7 V nut forming machine. 7 o i q i and 42 are formed on the portions 321and134: Figure2 is a; plan view ofthe same. E- of the ringC, opposite thehinge 38. Arzbolt' Figure 3 is an enlarged "sectional on is piyoted toithe ear 4rO;eirtends througlithe ear 42 and is provided with a wing nut 46 as best shown in Figure 2 of. the drawings. A

handle 48 is formed on the ringC.

- The hopper B is provided with flanges 50 and 52, aboveand below the ring C. From the construction of the ring, as just described, it will be obvious that the ring can beopened for removal of the hopper B for cleaning purposes. r r V The hopper B is provided with a 'ne'ckf54, terminating in a bell mouth 56. The neck 54, which is of tubular construction, is provided 7 with a skirt 58, extending into the bell mouth 56. A plunger is slidably mounted through the neck 54. The plunger 60 is fixed to the lower end of a rod 62 which extends upwardly through a bearing 64. The bearing 64 is supported by an arm 66 of split construetion; ex-

' tending from the c'am housing A;

As best shownin Figure 11, the arm 66 is provided with; a slot opening 68, 'wider'than the diameter of rod 62. The bearing 64 is 4 adaptedto be clamped between the halves of the arm 66 by a clamping bolt 70 and wing nut 7 2. When ther-ing C is opened to allow removal of the hopper B, the wing nut 72 may be loosened'suflicient to allow removal of the bearing 64 by pulling it upwardly, after which the rod 62 may be drawn through the $101568; Y i

A second plunger 74 'is slidably mounted through the neck 54. The plunger 74 is provi'ded with an opening 7 6 through whichthe rod 62 is slidably mounted. A pair of rods 78 are secured to the plunger 74 andextend e-up- Y wardly parallel with the rod 62 and positioned on opposite sides thereof. Ablock 80 is secured to the rod- 62 and provided with openings 82 through which the rods 78 are 'slidable. A second block 84'is secured to the rods 7 Sand is provided with an opening 86 through which the rod 62 is slidableQ The blocks 80 and 84 are provided with pintles 88. V Oscillatably mounted on pivot pins 90, carried by the cam housing A isa pair'of levers 92a'nd 94. The outer ends of the levers 92 and 94 are forked to coact'with the pintles 88- on the'blocks 80 and 84i Thus it-will be seen that oscillating movement, imparted to the arms 92 and 94 will cause reciprocating movement of the rods 62 and 68 and the plungers -60'and 74. It will also be seen that'removal *of'the hopper B from the ring C will disenage the 'pintles 88 from the forked ends of 55" he levers 92 and 94.

Aare provided with bearings 96a'nd '98 re- 7 spectivel'yn Sleeves'100and102 are journaled in the bearings 96 and 98'respeetively. A cam 7 104 is formed on the sleeve and a cam 106 is'formed on the sleeve 102. The lever 92 has 7 a projecting stud 108 onwhich is journaled a roller 1 10 forcoaction with the-cam groove 112 of'the cam 104. The lever 94'is'provided jwith a projecting stud 1'14 on which'i's 'jour The portions 24 and 26 of the cam'housing naled a roller 116 for coaction with the cam groove 118 in the. cam 106." Thus it will be seen that rotation of the cams 104 and 106 will cause movement of the plungers 60 and 74 through the neck 54.

The sleeve 100 of the cam 104 is loosely mounted on a shaft 120. The sleeve 102 of the cam 106 is secured to the shaft 120. A gauge lever 122 is secured to the sleeve 100 andgaugelever 124 issecured to the shaft 75 120. The gauge lever 122 is provided with a curved ,slot 126 in which the square portion beneath the head of a carriage bolt 128 is slidabl-y mounted: The bolt 128 extends through an opening in the gauge lever 124 and a wing 80 nut 130 is screwed thereon.

The gauge. lever--122 is provided with a graduated scale1-32 and the gauge lever 124 is provided with a pointer 134.

For imparting rotation to the shaft 120, I provide a motor .136 or other suitable power means; The shaft 138 'of the motor 136 is connected by-the coupling 140 with aworni shaft 142. The worm shaft 142 is journaled in bearings'144 and 146, supported between 110 the two halves, 148' and 150 of a worm gear casing D. 1 1

A wor1n152 is mounted on the worm shaft 142 and coacts with a worm gear 154, loosely {mounted on 'the shaft 120'and adapted to rotate whenever the motor 136 is energized. A

thrust washer 156 is provided for the worm 152. The worm gear 154 is retained on the shaft 120 by means of a retainer ring 158.

I provide a clutch means for ope'ratively 71m connecting theworm gear 154 with the shaft 120 consisting of a clutch member 160 slidably mounted on the "shaft 120. The clutch m mber 1160 "is provided with a spring pressed ball 162'ad'apted to selectively coact" with annular depressions 164 and 166 formed in the shaft 120. The clutch member 160 is provided with a stud 170adapted to enter any one of 'p y f openings 172 formed in t m gear 154'wl1en' the clutch is 011mm passion.

-- The clutch member 160 is provided with an annular groove 17 3 into which a pair of 190. Acrank l 92'may be secured to theshaft I 120 for hand operation'b'fthe doughnutforming machine when the clutch member. 160 is Practical operation consistency after the plungers 60 and 74 and.

the neck 54 etc-have been greased to prevent sticking of the dough to the machine. The motor 136 is then energized (with the clutch in off position as shown by dotted lines in Figure 6) until it attains its normal operating speed. The clutch may then be moved to on position as shown by full lines in Figure 6 and the cams 104 and 106 will be simultaneouslyrotated. Up and down movement will then be imparted to the plungers 60 and 74, the plunger 74,coming up into the tapered portion of the hopper B once each reciprocation and the plunger 60 extending below the skirt 58 once each reciprocation as shown in Figures 9 and 10 of the drawings.

When adjusted for small doughnuts, the

" The resulting actionis for the plunger 60 to remain stationary while the plunger 74 continues to move downwardly for squeezing the dough out into the bell mouth 56 as at 194 in Figure 9. The plungersthen bothmove upwardly for cutting the formed doughnut off as shown at 196 in Figure 9 and dropping it as indicated at 198 into-a suitable receptacle of hot oil. It will be noted that the plungers in their upward movement are slightly closer together than when coming down and the dough that has been discharged is represented by the difference in the volume between the plungers in the first two views of Figure 9 and the last two views thereof.

When the machine is adjusted for large after looking them in such'position for simultaneous rotation, the machine may be easily are easily cleaned by opening the ring removing the bearing 64 after the wing nut 72 is loosened and pulling the hopper,

For observing the use of the machine when ad ustmg it or for any other purpose, the.

machine'may be actuated by manually turning the crank 192. The hopper and plungers plungers and rods away from the cam hous-' ing A after which these parts may be dis-. assembled and washed and may then be easily and quickly replaced.

In the foregoing specification I have I'eferred to. adjusting the machine for large and small doughnuts. Actually the inside diameter of these doughnuts are substantially the same but their weight varies to some degree;

It will be noted that the bell mouth 56 is v held in position by a set screw 57, extendmg through a reduced portion 59 at the lower end of the hopper B and-into the neck sleeve 54; This set screw may be slightly loosened my intention to cover by -my claims, any I modified forms of structureor use of me-, chanical equivalents, which vmay be reasonably included. within their scope.

, I claim as my'invention: o

1. In a machine of the class described, a:

on the hopper, a plunger for travel therein, a plunger rod supporting said plunger, a

guide bearing for: said rod, a supporting arm for said'guide bearing, said arm being split to receive the hearing, such split being wide enough for the plunger rod to pass therethru.

2.In a machine of the class described, a. frame, a hopper detachably connected therewith, a neck on said hopper, .a plunger' for frame, a hopper detachable therefrom, a neck i travel through said neck, a plun er rod supporting said plunger,:a guide earing for said rod, a supporting arm forsaid guide bearing, said guide bearing beingfremovable therefrom, and a slot in said arm ,to' allow passageof said i plunger rod therethrough when said guide bearing is removed. 7 Des Moines, Iowa, October 25, 1929.

' V FRED L. SCHOEL.

and quickly adjusted for doughnuts of any 

